<template>
    <div class="list" ref="wrapper">
      <div>
      <div class="area">
        <div class="title border-topbottom">当前城市</div>
        <div class="button-list">
          <div class="button-wrapper">
            <div class="button">北京</div>
          </div>
        </div>
      </div>
      <div class="area">
        <div class="title border-topbottom">热门城市</div>
        <div class="button-list">
          <div class="button-wrapper" v-for="(item,index) in hotCities" :key="item.id">
            <div class="button">{{item.name}}</div>
          </div>
        </div>
      </div>
      <div class="area"
           v-for="(item,key) of cities"
           :key="key"
           :ref="key"
      >
        <div class="title border-topbottom">{{key}}</div>
        <div class="item-list">
          <div class="item border-bottom"
               v-for="innerItem of item"
               :key="innerItem.id"
          >{{innerItem.name}}</div>
        </div>
      </div>
      </div>
    </div>
</template>

<script>
  import Bscoll from 'better-scroll'
    export default {
        name: "CityList",
      props:{
          hotCities:Array,
          cities:Object,
          letter:String
      },
        mounted (){
          this.scoll=new Bscoll(this.$refs.wrapper)
      },
      watch:{
          letter(){
            const element=this.$refs[this.letter][0]
            this.scoll.scrollToElement(element)
          }
      }
    }
</script>

<style scoped lang="stylus">
  .border-topbottom
    &:before
      border-color: #ccc
    &:after
      border-color: #ccc
  .border-bottom
    &:before
      border-color: #ccc
  .list
    overflow: hidden
    position absolute
    top: 1.58rem
    left: 0
    right: 0
    bottom: 0
    .title
      line-height: .54rem
      background #eee
      padding-left: .2rem
      color: #666
      font-size: .26rem
    .button-list
      overflow: hidden
      padding: .1rem .6rem .1rem .1rem
      .button-wrapper
        float: left
        width: 33.33%
        .button
          padding: .1rem 0
          margin: .1rem
          text-align: center
          border: .02rem solid #ccc
          border-radius: .06rem
    .item-list
      .item
        line-height: .76rem
        padding-left: .2rem
</style>
